I have no idea of relevance or past history but this area seems very busy to this layman, at the time of this posting and as I start to write this post the count went from 61 earthquakes to 63 earthquakes this week including the 4.1 event yesterday.
Scientists have shown that the rules governing aftershock behavior also apply to “aftershocks” that are larger than their main shock - i.e., the possibility that the first event was a foreshock of a future larger event.
Aftershock?, Foreshock?, Earthquake cluster? only time will tell...
What Are Aftershocks, Foreshocks and Earthquake Clusters? find out at : USGS Link
The minimum magnitude ( M) values in the following bullets reflect the smallest earthquake which the network can routinely record within the region. During the previous seven-day period ending at midnight (UT) Wednesday, our seismic networks recorded
- 21 M >2.0 earthquakes in Northern and Central California (map) (within dashed polygon of figure).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.5, 6 miles SSE of Parkfield, CA at 02:44 PM UTC Sunday, 11 23, 2008 (06:44 AM PST Sunday, Nov 23, 2008).
- 24 M >1.2 earthquakes in the San Francisco Bay area (map).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.1, 6 miles NE of American Canyon, CA at 01:04 AM UTC Monday, 11 24, 2008 (05:04 PM PST Sunday, Nov 23, 2008).
- 8 M >1.2 earthquakes in the Long Valley region (map).
The largest event to occur this week in this region was a microearthquake of magnitude 1.6, 12 miles SW of Toms Place, CA at 03:17 AM UTC Saturday, 11 22, 2008 (07:17 PM PST Friday, Nov 21, 2008).
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